One vertex per element, one color per generator, with an edge from x to x·s.
(1,2,6,8)(3,7,5,4)(9,10,14,11)(12,16,13,15)(17,18,21,24)(19,23,20,22)(26,29)(27,31)(1,3,6,5)(2,4,8,7)(10,11)(15,16)(17,19,21,20)(18,22,24,23)(26,29)(27,31)(1,4,6,7)(2,3,8,5)(9,11,14,10)(12,16,13,15)(25,26,28,29)(27,30,31,32)(1,2)(3,4)(5,7)(6,8)(9,12,14,13)(10,15,11,16)(25,27)(26,30)(28,31)(29,32)(1,5,6,3)(2,7,8,4)(9,13,14,12)(10,16,11,15)(17,20,21,19)(18,23,24,22)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.